* {
    padding: 0;
    margin: 0;
}

a {
    list-style: none;
    text-decoration: none;
    color: #333333;
}

.nav_bar {
    height: 50px;
}

.nav_bar a {
    width: 60px;
    height: 48px;
    text-align: center;
    line-height: 50px;
    float: left;
}

.nav_bar a:hover {
    color: #32CA99;
}

.nav_bar .last_li {
    width: 120px;
    float: right;
}

.nav_bar .choosed {
    border-bottom: solid 2px #32CA99;
    color: #32CA99;
}